Impulse starting-coupling.



H. TIEDEMAN N. IMPULSE STARTING c uPLma. APPLICATION FILED .IULY 15 l9l8.

Patented Feb. 25, 1919'.

HENRK- T/EDEMHNN iv driving and driven members.

HENRY TKEDEE1NhT,QF EiiEW'ARK, NEW JERSEY, ASSIGNOl-t T6 SPLITDORF ELECTRICAL CQMPANY, 0F NEWARK, E'EW' JERSEY.

I IIVEPULSE STARTING-COWPLXNG.

7 '0 all whom it may concern:

Be it known that I, HENRY Tmonnann, a citizen of the United States, residinc at Newark, in the county of Essex and tate ofNe'w Jersey, have invented certain new and useful Improvements in Impulse Starting-Couplings, of which the following is a specification.

My invention relates to a coupling device fuel is oflow gravity test and not easily vaporized. As soon as the engine is started,

the magneto supplies ideal ignition and in order, therefore, to overcome the objection of hard starting it has become quite cominon to use a device which will accelerate the speed of the rotating part of the magneto at. the time the engine is going over compression. By supplying adevice of this char-- acter sparks are obtained atthe instant of starting which are equivalent to those obtained under ordinary running conditions or an even better spark may be obtained.

Tn general, an impulse starting coupling ons-ists' of a driven member fastened to the operating ll2 lft of the ignition generator, at

driving member associated with the driven i-m-mber and having a resilient member ihrming a driving connection between the Some means is provided to retard orstop the driven member and consequently the operating shaft of the ignition generator from rotating over a predetermined period, then releasing the driven member which, acting under the force of the energy stored in the resilient been driven. forward of the driven member, is given a sudden impulse forward, thereby producing a hot spark.

It is the object ofmy invention to pro- .vide a simple, inexpensive, positively acting device for controlling the driven member to produce theimpulse.

In describing my invention, I have utilized Specification of Letters Patent.

Patented Feb. 7433, 19159.

Application filed July 15, 1918. Serial No. 245,060.

a type ofroupling shown and described in Patent #1.226,933. issued May 22, 1917, to Fred B. iiillian'is but since my invention is directed to means for controlling the driven member to get the impulse, and not to the details of the Coupling itself, the construction of the coupling will only be briefly here in referred to, as the operation of these devices is now .well understood.

In the drawing which forms a part of this specification. Figure 1V is a part end viewof a magneto showing the coupling in position on the operating shaft and the controlling means in the off or out of engagement position with the driven member.

Fig. 2 is a view similar to Fig. I but with the controlling means in the in engagement position with the driven member,

Fig. 3 is a view of the driven member with the impulse and buffersprings in place,

together with the studof the driving member in operative position. The end of the ignition generator shaft is also shown.

Refierringnowto the details, in which like numbers refer tocorresponding parts in the various views, 1 is a plate mounted on the end ofthe ignition generator, through which the operating; shaft. 2 projects. The driven member 3 is hold in operative position on the operating shaft 2 by the usualtaper and key (not shown) and nut The driven member carries an impulse spring 5 which abuts at one end against the stop 6 attached'to the member -3 and at the other end against the Stop 7 carried on the driving member 8. Be-

-tween the sto s 6 and? is a butler s )rin 9 P l a leased and sent'forward under the force of the spring 5, all as fully explained in the said Williams patent. The driving member 8 has a cross slot 10 to receive a driving means attached to the engine. The driving member also has-cams 11 and 12 for a purpose which will be hereinafter explained.

Mounted onthe plate l is a pawl 13 pivoted at ii. The pawl 13 can be shiftedso that the nose 15 engages notches 16 and 17 in the driven member i). On the top side of the pawl are two depressionsor recesses 18 and 19, with a gromnied end projection 20 separating the Said depressions or recesses. Qarried on the plate 1 is a resiliently mount- Vic ' Fig. 2. member 8 causes either the cam 11 or 12 to raise the nose -15 of the pawl 13 out of en ed member which preferably takes the form of a cylinder 21 within which is a spring 22 that acts on a plunger 23, preferably in the shape .of a ball. The spring 22 is put under more or less compression stressby an ad- .justing screw 24. The resiliently mounted member iscarried on the plate 1 in such a manner that its line of action, when the pawl iseither in the in or out position, is in line with the pivot 14 so that as the pawl 13 is moved to either the in or out position the plunger 23 will be either in the recess .18 or 19, the projection 20 being so formed that it will not rest on it. y

In the operation of my device the'operating means, such as a rodor cord of some sort is attached to the pa w1"13 by means of the boihdition the driven member-3 is held from rotation and the driving member 8 advances I until either one of the cams 11 or 12 engages the pawl 13 along the line 26. as shown 111 Further rotation of the driving gagement with either one of the notches 16 or 17 and as soon as the nose 15 is clear from said notches the driven member- 3 with the shaft 2 is thrown rapidly forward by the impulse spring 5 producing a spark, as here tofore described. Assumm' that the englne immediately picks up the cams 11 and 12 will soon hit the nose 15 hard enough to throw the pawl 13 to theposition in Fig. l where it is held by the plunger dropping into the recess 18 ready for the next start.

I have found the abovedescribed construction very positive in its action and while I have shown one type of resiliently mounted member-for acting in'the pawl, I do not wish to be limited to the exact form of this memher or the pawl itself, other than is limited by the scope of the appended claims. Having thus described my invention what I claim is y 1. In an impulse starting couplii'ig for an ignition generator having. an operating shaft, a driven member fastened to said -shaft, a driving member associated therewith, a resilient member forn'iing a driving connection between the.driving and driven members, a pivoted pawl stop for said driven member and shaft=means operated by the driving member for engaging the pawl stop to remove it from engagement with the driven member and a latch 'acting substantially in line with the pivotal point of the pawl for holding the pawl in or out of engagement with the driven member af-.

ter having been so positioned.

-ter having been so positioned .15. In an impulse startlng coupl ng for an 1gnit1on generator havmg an operating.

2. In an impulse starting couplingfor an ignition generator having- .an operating shaft, a driven member fastened to said shaft, a driving member associated therewith, a resilient member forming a driving connection between the driving and driven members, a pivoted'pawhstop for said driven. member and shaft, meansoperated by the driving member for' engaging the pawl stop to remove it from engagement 7 i with the driven member and a latch of the plunger type having the-plunger acting on and substantially in line with the pivotal point'of the pawl for holding thepawl 1n or out of engagement'with the driven .30

shaft, a driven member fastened .to said,

shaft, a driving member associated there- 5 with, a resilient member. forming a driving connection between the driving and driven members, a pivoted pawl "stop for said driven member and shaft, means operated by the driving member for engaging the pawlfstop to remove it from engagement with the driven member and a latch c0nsisting of a casing carryinga spring' operated plunger acting substantially-.in line with the pivotal point of the pawl for holding the pawl in or out of engagement with. the drivenmember afterhaving been so positioned.

, 4. In" an impulse starting coupling for an ignition generator having. an operating 190 shaft, a. driven member fastened to said shaft, a driving member associated therewith, aresilient member forming a driving connection between the driving and driven members, a pivoted pawl stop for said driven member'and shaft, means operated by the driving member for engaging the pawl stop'to remove it from engagement vwith the driven member, said pawl'having two recesses clo'sely adjacent each other and 11 a --latch of the. plunger type having the plunger seated in either one or the other of said recesses to hold the pawl in or out ofengagement with the driven member afshaft, a driven ,member fastened to said "shaft a driving member associated therewith, a resilient member forming a driving connection" between the driving andv driven members, a pivoted pawl stop for said driven member and shaft, means operated by the driving member for engaging the pawl stop to. remove it from engagement with the driven member, a latch consisting of an adjustable resiliently mounted inemher with means on said pawl to positively position saidinember in either one of two positions offengagement therewith to hold I" the pawl in or out of engagement with the driven member after the pawl has been so positioned, I

6. In an impulse starting coupling for an ignition generator having an operating shaft, a driven member fastened to said shaft, a driving member associated-there with, a resilient member forming a drivingoonnectio'n bet ween'the driving and driven members, a pivoted pawl stop for said driven member and Shaft, means open sisting of a casing carrying an adjustable spring operated plunger, recesses on the up per side of said pawl to receive saidiplunger whereby the pawl is held either in or out, of engagement with the driven member after hnvin been so positioned.

In witness whereof, I aflix niv signature.

HENRY TIEDEMANN. 

